package dav

import (
	"fmt"
	"net/http"
	"path"
	"strings"

	"github.com/debridmediamanager/zurg/internal/torrent"
	"go.uber.org/zap"
)

func HandleDeleteRequest(w http.ResponseWriter, r *http.Request, t *torrent.TorrentManager, log *zap.SugaredLogger) {
	requestPath := path.Clean(r.URL.Path)
	filteredSegments := splitIntoSegments(requestPath)

	var err error
	switch {
	case len(filteredSegments) == 0:
		err = fmt.Errorf("cannot delete root")
	case len(filteredSegments) == 1:
		err = fmt.Errorf("cannot delete configured directory")
	case len(filteredSegments) == 2:
		err = handleDeleteTorrent(w, filteredSegments, t)
	case len(filteredSegments) >= 3:
		err = handleDeleteFile(w, filteredSegments, t)
	default:
		log.Warnf("Request %s %s not found", r.Method, requestPath)
		http.Error(w, "Not Found", http.StatusNotFound)
		return
	}

	if err != nil {
		if strings.Contains(err.Error(), "cannot find") {
			http.Error(w, "Not Found", http.StatusNotFound)
			return
		}
		log.Errorf("Error processing request: %v", err)
		http.Error(w, "Server error", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "text/xml; charset=\"utf-8\"")
}

func handleDeleteTorrent(w http.ResponseWriter, segments []string, t *torrent.TorrentManager) error {
	directory := segments[0]
	torrents, ok := t.DirectoryMap.Get(directory)
	if !ok {
		return fmt.Errorf("cannot find directory %s", directory)
	}

	accessKey := segments[1]
	tor, ok := torrents.Get(accessKey)
	if !ok {
		return fmt.Errorf("cannot find torrent %s", accessKey)
	}

	t.Delete(tor.AccessKey)

	w.WriteHeader(http.StatusNoContent)
	return nil
}

func handleDeleteFile(w http.ResponseWriter, segments []string, t *torrent.TorrentManager) error {
	directory := segments[0]
	torrents, ok := t.DirectoryMap.Get(directory)
	if !ok {
		return fmt.Errorf("cannot find directory %s", directory)
	}

	accessKey := segments[1]
	tor, ok := torrents.Get(accessKey)
	if !ok {
		return fmt.Errorf("cannot find torrent %s", accessKey)
	}

	// set filepath to last segment
	filepath := segments[len(segments)-1]
	file, ok := tor.SelectedFiles.Get(filepath)
	if !ok {
		return fmt.Errorf("cannot find file %s", filepath)
	}

	file.Link = "unselect"
	t.ScheduleForRefresh()
	w.WriteHeader(http.StatusNoContent)
	return nil
}